Manufacturer's Part Number:
COMP Cams XFI Xtreme Truck Camshafts
Summit Racing Part Number:
Hydraulic roller tappet
Basic Operating RPM Range:
Intake Duration at 050 inch Lift:
Exhaust Duration at 050 inch Lift:
Duration at 050 inch Lift:
212 int./216 exh.
Advertised Intake Duration:
Advertised Exhaust Duration:
266 int./270 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
Exhaust Valve Lift with Factory Rocker Arm Ratio:
Valve Lift with Factory Rocker Arm Ratio:
0.520 int./0.524 exh.
Lobe Separation (degrees):
Camshaft Gear Attachment:
Valve Springs Required:
Requires custom computer tuning. Cannot use stock springs.
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Release the incredible horsepower and torque hidden inside your vehicle's engine with COMP Cams XFI Xtreme truck camshafts. Available in three different profiles (XFI 260, 261, and 266), these cams utilize advanced camshaft technology used in fuel injected engines to deliver improved throttle response and better mid and upper rpm power. COMP Cams XFI truck camshafts (for the GM Gen III engines) are compatible with the factory computer systems and wiring, but deliver the best performance when used with upgraded COMP Cams valvetrain equipment, including valve springs, retainers, and locks. Computer tuning is required; use a Fast Flash Cam Tuner Programmer for best results.